Dell Precision WorkStation 420 Service Manual page 31

5.25-Inch Diskette, Tape, or CD-ROM Drive Replacement
To install a replacement 5.25-inch diskette, tape, or CD-ROM drive, perform the following steps.
CAUTION: Before you remove the computer cover, see
1. Unpack the replacement drive and prepare it for installation.
NOTICE: Ground yourself by either wearing a wrist grounding strap or by touching an unpainted metal surface on the
computer chassis.
Check the documentation that accompanied the drive to verify that the drive is configured for your computer system. Change any
settings necessary for your configuration.
2. If you are installing an enhanced integrated drive electronics (EIDE) drive, configure the drive for the Cable Select setting as described in
the documentation that accompanied your drive.
3. Remove the computer cover
4. Remove the front panel if it is not already off.
5. Attach the new drive to the drive bracket.
Turn the drive upside down, and locate the four screw holes around its perimeter. Fit the bracket over the drive, and then tilt the front of the
drive up so that the bracket drops down into place. To ensure proper installation, all screw holes should be aligned and the tabs on the front
of the bracket should be flush with the front of the drive (see
To further ensure proper positioning of the drive in the chassis, insert and tighten all four screws in the order in which the holes are
numbered (the holes are marked "1" through "4" on the bracket bottom).
6. Slide the new drive into the drive bay until the drive snaps securely into place (see Figure 13).
Make sure that both bracket tabs snap into place in the drive bay.
Figure 13. 5.25-Inch Drive Replacement
if it is not already off.
Figure
1 Metal tab
2 Drive bracket
3 Screws (4)
Precautionary Measures.
13).